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344 results on '"Song, Chunlei"'

6. A Generative Adversarial Framework for Optimizing Image Matting and Harmonization Simultaneously

Author

Ren, Xuqian, Liu, Yifan, and Song, Chunlei

Subjects
Computer Science - Computer Vision and Pattern Recognition
Abstract

Image matting and image harmonization are two important tasks in image composition. Image matting, aiming to achieve foreground boundary details, and image harmonization, aiming to make the background compatible with the foreground, are both promising yet challenging tasks. Previous works consider optimizing these two tasks separately, which may lead to a sub-optimal solution. We propose to optimize matting and harmonization simultaneously to get better performance on both the two tasks and achieve more natural results. We propose a new Generative Adversarial (GAN) framework which optimizing the matting network and the harmonization network based on a self-attention discriminator. The discriminator is required to distinguish the natural images from different types of fake synthesis images. Extensive experiments on our constructed dataset demonstrate the effectiveness of our proposed method. Our dataset and dataset generating pipeline can be found in \url{https://git.io/HaMaGAN}, Comment: Extension for accepted ICIP 2021

Published
2021

20. Electrocapillarity‐Induced Hurricane‐in‐a‐Tube Enables the Generation and Patterning of Liquid Metal Droplets.

Author

Song, Chunlei, Tao, Xianzan, Chen, Yicheng, Mao, Kaihao, Tao, Ye, Ge, Zhenyou, Wen, Hongyan, Chen, Gaofeng, Li, Biao, Xue, Rui, Jiang, Xikai, Zheng, Xu, and Ren, Yukun

Subjects
*LIQUID metals, *COMPOSITE materials, *INTERFACIAL tension, *SURFACE tension, *ELECTRIC currents
Abstract

Room‐temperature liquid metal droplets (LMDs) are a promising material for various applications in soft robotics, active droplets, and biomedical devices. However, controllable and high‐throughput production of LMDs remains challenging due to their high surface tension and density. Here, a novel strategy is presented to produce LMDs by combining electric field‐induced electrocapillary flow with an external flow field. The basic mechanism is that the electrocapillary flow induced at the LMD/electrolyte interface forms a vortex ring in the electrolyte, creating a hurricane‐like effect in the tube, which in turn causes the liquid metal to deform and eventually pinch off into small droplets. It is demonstrated that droplet size and generation frequency can be controlled precisely by adjusting the applied electric current, flow rate, and surfactant concentration, establishing a relationship between radius and experimental parameters through dimensionless analysis. More importantly, this strategy can handle pendant droplets and facilitate programmable droplet patterning. Leveraging established relationships, flexible control over droplet size and spacing during patterning is attained. Furthermore, an iontronic pressure‐sensitive device based on LMDs and hydrogel is developed to showcase the versatility of the approach. This technique opens up new opportunities for fabricating soft circuits, composite materials, and other functional devices with LMDs. [ABSTRACT FROM AUTHOR]

Published
2024
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35. An Improved Authentication Protocol in Telemedicine System

Author

Zheng, Lijuan, Zhang, Yunjia, Zhang, Rui, Chen, Jianyou, Cui, Meng, Song, Chunlei, Hutchison, David, Series Editor, Kanade, Takeo, Series Editor, Kittler, Josef, Series Editor, Kleinberg, Jon M., Series Editor, Mattern, Friedemann, Series Editor, Mitchell, John C., Series Editor, Naor, Moni, Series Editor, Pandu Rangan, C., Series Editor, Steffen, Bernhard, Series Editor, Terzopoulos, Demetri, Series Editor, Tygar, Doug, Series Editor, Hu, Ting, editor, Wang, Feng, editor, Li, Hongwei, editor, and Wang, Qian, editor

Published
2018
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